| Message ID | 20220317190109.3742-5-leoyang.li@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/6] arm64: dts: ls2080a-qds: add mdio mux nodes from on-board FPGA | expand |
On Thu, Mar 17, 2022 at 02:01:08PM -0500, Li Yang wrote: > From: Biwen Li <biwen.li@nxp.com> > > Specify a channel zero in idle state to > avoid enterring tri-stated state for PCA9547. Please check Documentation/process/submitting-patches.rst for commit log wrapping requirement. > About E-00013: > - Description: I2C1 and I2C3 buses Use space instead of tab for bullet indent. Shawn > are missing pull-up. > - Impact: When the PCA954x device is tri-stated, the I2C bus > will float. This makes the I2C bus and its associated > downstream devices inaccessible. > - Hardware fix: Populate resistors R189 and R190 for I2C1 > and resistors R228 and R229 for I2C3. > - Software fix: Remove the tri-state option from the PCA954x > driver(PCA954x always on enable status, specify a > channel zero in dts to fix the errata E-00013). > > Signed-off-by: Biwen Li <biwen.li@nxp.com> > Signed-off-by: Li Yang <leoyang.li@nxp.com> > --- > arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi > index 4b71c4fcb35f..a752f06a2e74 100644 > --- a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi > +++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi > @@ -49,6 +49,8 @@ pca9547@75 { > reg = <0x75>; > #address-cells = <1>; > #size-cells = <0>; > + idle-state = <0>; > + > i2c@1 { > #address-cells = <1>; > #size-cells = <0>; > -- > 2.25.1 >
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi index 4b71c4fcb35f..a752f06a2e74 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa-rdb.dtsi @@ -49,6 +49,8 @@ pca9547@75 { reg = <0x75>; #address-cells = <1>; #size-cells = <0>; + idle-state = <0>; + i2c@1 { #address-cells = <1>; #size-cells = <0>;